Block of clay or concrete for sewers, &amp;c.



A. 0. STENWICK. BLOCK 0F CLAY 0R CONCRETE FOR SEWERS, 84c.

APPLICATION FILED MAR. 15. 191?.

1,268,294; I PatentedJune, 191.8.

INV AN'TOR BY has JYJ'TOIZJVTEY:

ALBERT 0.

STEIN- ICK, 01 RED WING, MINNESQTA.

Bacon orcLaY on concnnrn roe snwnns, &o.

To 61112075077221, may concern:

Be it known that I, ALBERTO. STE-NWICK, a citizenof the United States, residing at lied lVing, inthe county ofGoodhue and State of Minnesota, haveinvented new and useful Blocks of'Clay 01'. Concrete for Sewers, &c., of which the following is a specification. My invention relates to blocks for the construction of sewers and other structures for clay or concrete maywhich blocks of bu'rne be used. 1 r

The main objects of the invention are, first, to provide extra strong, durable segmental blocks for the construction of large sewers. Second, to firmly unite the ends and edges .of such blocks. Third, to so form the blocks. that the bottom of the sewer will have several small channels instead of a single large bottom channel which iswellknown to cause lodging of sewerage and clogging of the sewer. Fourth, to so con,-

struct raid sewer blocks that they may be burned without cracking.

In the accompanyin drawing, Figure 1 is an end elevation o a large sewer constructed of my improved blocks. Fig. 2 is an enlarged portion of Fig. 1. Fig. 3 is a perspective View of one of the blocks used in the bottom of the sewer. Fig. at is a section on the line a a in Fig. 2. Fig. 5 is the middle portion of Fig. i modified. Fig. 6 is a perspective view of two of the wedges employed to lend firmness to the joints of the blocks.

Referring to the drawing by reference numerals, it will be observed in Fig. 1 that the inner faces 7 of the blocks 6 in the main upper partof the sewer are plain segmental faces with a curvature corresponding to the radius of thesewer; but. the blocksS forming thelower part of the sewer have their inward or upward segmental faces formed with longitudinal grooves 9 for more or less water to run along many or few of them and thus move the sewerage along with the force of water running in a channel and not like water having lost its force by being spread thinly upon a broad surface forn'iing the,

bottom of a sewer.

As best shown in Fig. 2, but also in Fig. 1. the adjacent joined edges or sides of the blocks are each formed with tworibs 10, 11, each of which is formed with a V-shaped groove in which to receive a V-shaped edge Specification of Letters Patent.

Patented June a, wad.

application filed March 15, 1917. Serial No. 155,087.

of the adjacent ribs of the other block, said ribs having also adjacent fiat faces 12 and 13 with an intervening space between them, and in said space are tightly inserted overlapping wedges 14 and driven home in cement mortar so as to hold'theribs 10, 11, in the grooves and thereby give great rigidity to the sewer-against both inward and outward pressure. The wedges 14 are made of the same kind of 'inaterial as the blocks. To make the \l-shaped edges of the ribs more substantial both for handling and for service, they are blunt or trunked as best shown-in Fig. 3.

The adjacent ends of the blocks are provided one with a groove having a face 15 parallel to the segmental face of the block and one inclined face 16, the other block having a rib 17 fitting in said groove.-

Each block is also formed with longitudinal ducts 18 near its inner face, andlarger longitudinal ducts 19 near the outer segmental face and between said small and large ducts is a strong segmental web 20.

lightened only by' a series of small ducts 21 mortar is applied to all joints to make the structure water-tight. And during the constructing work the ducts 19 may serve as escape ducts for water which will often enter into the trench in which the sewer is being built.

As already partly stated, the interlocking edges of the blocks and the wedges employed to hold the part interlocked are applicable not only to sewer construction but also for building block' of artificial stone, concrete and tiles in silos and buildings in general, and especially where the wall, roof. ceiling or floor involved is of arched or curved form.

What I claim is:

1. Building-blocks adapted to be fitted together in a structure, said bl0Cks 'having each an outer and an inner main face and adjoining faces to form joints. said adjoining faces having each a pair of spacedparallel ribs, each with a longitudinal groove near the block, whereby a lateral ridge is formed on each rib. said ridges arranged inopposite directions onthe adjoining faces of the blocks so as to engage with the ridges of,

gne block in the grooves of the ribs on the 1 other b1ock,and when so engaged to form an angular space between the a ungrooved sldes of the two ribsabout nndwav between the inner and outermain face of each block;

I eachan outer and an inner main face and "adjoining facesto "forrn joints, said adjoining faces having eacha pair of spaced parallelribs; eaohuwith a longitudinal groove near'the' block, whereby a lateral-ridge is formed on each 11b,- saild'ridges arranged in "opposite directions on the adjoining faces of the blocks so astoengage with the ridges of one block In the'grooves of the llbS 011 the other block, and When so engaged to form an angular space :between, the ungro'ored sides. ofthe. two ribs about mid- -.-way]hetween thelnner and outer main face of each block, and a series of overlapping doubloedged Wedges adapted to be driven intolsaid space sofas to'hold the ribs with @the ridges firmly engaged in the grooves,

raid grooves and ridges fitting therein hav- Leeaaea ing inclined adjacent faces whereby to draw the blocks together.

8. Building blocks adapted to be fitted together 1n a structure, said blocks having the blocks was to engage vith the. ridges of one block in the grooves otthe ribs 011': the other block, and Whenso engaged, to form an angular space between the ungrooved sides of the two ribs about midway between the inner and outer main face of each block, and a series of overlapping double-edged wedges adapted to be driven into said space so as to hold the ribs with the ridges firmly engaged in the grooves said grooves and ridges fitting therein having inclined adjacent faces whereby to draw the blocks together, said blocks being curved so as to form when put together an arched or even cylindrical structure.

In testimony whereof I afiix my signature.

ALBERT o. STENWICK; 

